Default to Jina search, reader API when no Serper.dev, Olostep API keys

Jina AI provides a search and webpage reader API that doesn't require
an API key. This provides a good default to enable online search for
self-hosted readers requiring no additional setup.

Jina search API also returns webpage contents with the results, so
just use those directly when Jina Search API used instead of
trying to read webpages separately. The extract relvant content from
webpage step using a chat model is still used from the
`read_webpage_and_extract_content' func in this case.

Parse search results from Jina search API into same format as
Serper.dev for accurate rendering of online references by clients

src/khoj/processor/tools/online_search.py

@@ -2,6 +2,7 @@ import asyncio
 import json
 import logging
 import os
+import urllib.parse
 from collections import defaultdict
 from typing import Callable, Dict, List, Optional, Tuple, Union
 
@@ -22,6 +23,10 @@ logger = logging.getLogger(__name__)
 SERPER_DEV_API_KEY = os.getenv("SERPER_DEV_API_KEY")
 SERPER_DEV_URL = "https://google.serper.dev/search"
 
+JINA_READER_API_URL = "https://r.jina.ai/"
+JINA_SEARCH_API_URL = "https://s.jina.ai/"
+JINA_API_KEY = os.getenv("JINA_API_KEY")
+
 OLOSTEP_API_KEY = os.getenv("OLOSTEP_API_KEY")
 OLOSTEP_API_URL = "https://agent.olostep.com/olostep-p2p-incomingAPI"
 OLOSTEP_QUERY_PARAMS = {
@@ -49,9 +54,6 @@ async def search_online(
     custom_filters: List[str] = [],
 ):
     query += " ".join(custom_filters)
-    if not online_search_enabled():
-        logger.warn("SERPER_DEV_API_KEY is not set")
-        return {}
     if not is_internet_connected():
         logger.warn("Cannot search online as not connected to internet")
         return {}
@@ -67,25 +69,28 @@ async def search_online(
             await send_status_func(f"**🌐 Searching the Internet for**: {subqueries_str}")
 
     with timer(f"Internet searches for {list(subqueries)} took", logger):
-        search_tasks = [search_with_google(subquery) for subquery in subqueries]
+        search_func = search_with_google if SERPER_DEV_API_KEY else search_with_jina
+        search_tasks = [search_func(subquery) for subquery in subqueries]
         search_results = await asyncio.gather(*search_tasks)
         response_dict = {subquery: search_result for subquery, search_result in search_results}
 
-    # Gather distinct web pages from organic search results of each subquery without an instant answer
-    webpage_links = {
-        organic["link"]: subquery
+    # Gather distinct web page data from organic results of each subquery without an instant answer.
+    # Content of web pages is directly available when Jina is used for search.
+    webpages = {
+        (organic.get("link"), subquery, organic.get("content"))
         for subquery in response_dict
         for organic in response_dict[subquery].get("organic", [])[:MAX_WEBPAGES_TO_READ]
         if "answerBox" not in response_dict[subquery]
     }
 
     # Read, extract relevant info from the retrieved web pages
-    if webpage_links:
+    if webpages:
+        webpage_links = [link for link, _, _ in webpages]
         logger.info(f"🌐👀 Reading web pages at: {list(webpage_links)}")
         if send_status_func:
             webpage_links_str = "\n- " + "\n- ".join(list(webpage_links))
             await send_status_func(f"**📖 Reading web pages**: {webpage_links_str}")
-    tasks = [read_webpage_and_extract_content(subquery, link) for link, subquery in webpage_links.items()]
+    tasks = [read_webpage_and_extract_content(subquery, link, content) for link, subquery, content in webpages]
     results = await asyncio.gather(*tasks)
 
     # Collect extracted info from the retrieved web pages
@@ -139,10 +144,13 @@ async def read_webpages(
     return response
 
 
-async def read_webpage_and_extract_content(subquery: str, url: str) -> Tuple[str, Union[None, str], str]:
+async def read_webpage_and_extract_content(
+    subquery: str, url: str, content: str = None
+) -> Tuple[str, Union[None, str], str]:
     try:
-        with timer(f"Reading web page at '{url}' took", logger):
-            content = await read_webpage_with_olostep(url) if OLOSTEP_API_KEY else await read_webpage_at_url(url)
+        if is_none_or_empty(content):
+            with timer(f"Reading web page at '{url}' took", logger):
+                content = await read_webpage_with_olostep(url) if OLOSTEP_API_KEY else await read_webpage_with_jina(url)
         with timer(f"Extracting relevant information from web page at '{url}' took", logger):
             extracted_info = await extract_relevant_info(subquery, content)
         return subquery, extracted_info, url
@@ -177,5 +185,41 @@ async def read_webpage_with_olostep(web_url: str) -> str:
             return response_json["markdown_content"]
 
 
-def online_search_enabled():
-    return SERPER_DEV_API_KEY is not None
+async def read_webpage_with_jina(web_url: str) -> str:
+    jina_reader_api_url = f"{JINA_READER_API_URL}/{web_url}"
+    headers = {"Accept": "application/json", "X-Timeout": "30"}
+    if JINA_API_KEY:
+        headers["Authorization"] = f"Bearer {JINA_API_KEY}"
+
+    async with aiohttp.ClientSession() as session:
+        async with session.get(jina_reader_api_url, headers=headers) as response:
+            response.raise_for_status()
+            response_json = await response.json()
+            return response_json["data"]["content"]
+
+
+async def search_with_jina(query: str) -> Tuple[str, Dict[str, List[Dict]]]:
+    encoded_query = urllib.parse.quote(query)
+    jina_search_api_url = f"{JINA_SEARCH_API_URL}/{encoded_query}"
+    headers = {"Accept": "application/json"}
+    if JINA_API_KEY:
+        headers["Authorization"] = f"Bearer {JINA_API_KEY}"
+
+    async with aiohttp.ClientSession() as session:
+        async with session.get(jina_search_api_url, headers=headers) as response:
+            if response.status != 200:
+                logger.error(await response.text())
+                return query, {}
+            response_json = await response.json()
+            parsed_response = [
+                {
+                    "title": item["title"],
+                    "content": item.get("content"),
+                    # rename description -> snippet for consistency
+                    "snippet": item["description"],
+                    # rename url -> link for consistency
+                    "link": item["url"],
+                }
+                for item in response_json["data"]
+            ]
+            return query, {"organic": parsed_response}

src/khoj/routers/api_chat.py

@@ -29,11 +29,7 @@ from khoj.processor.conversation.prompts import (
 )
 from khoj.processor.conversation.utils import save_to_conversation_log
 from khoj.processor.speech.text_to_speech import generate_text_to_speech
-from khoj.processor.tools.online_search import (
-    online_search_enabled,
-    read_webpages,
-    search_online,
-)
+from khoj.processor.tools.online_search import read_webpages, search_online
 from khoj.routers.api import extract_references_and_questions
 from khoj.routers.helpers import (
     ApiUserRateLimiter,
@@ -767,22 +763,16 @@ async def websocket_endpoint(
             conversation_commands.remove(ConversationCommand.Notes)
 
         if ConversationCommand.Online in conversation_commands:
-            if not online_search_enabled():
-                conversation_commands.remove(ConversationCommand.Online)
-                # If online search is not enabled, try to read webpages directly
-                if ConversationCommand.Webpage not in conversation_commands:
-                    conversation_commands.append(ConversationCommand.Webpage)
-            else:
-                try:
-                    online_results = await search_online(
-                        defiltered_query, meta_log, location, send_status_update, custom_filters
-                    )
-                except ValueError as e:
-                    logger.warning(f"Error searching online: {e}. Attempting to respond without online results")
-                    await send_complete_llm_response(
-                        f"Error searching online: {e}. Attempting to respond without online results"
-                    )
-                    continue
+            try:
+                online_results = await search_online(
+                    defiltered_query, meta_log, location, send_status_update, custom_filters
+                )
+            except ValueError as e:
+                logger.warning(f"Error searching online: {e}. Attempting to respond without online results")
+                await send_complete_llm_response(
+                    f"Error searching online: {e}. Attempting to respond without online results"
+                )
+                continue
 
         if ConversationCommand.Webpage in conversation_commands:
             try:
@@ -1067,18 +1057,10 @@ async def chat(
         conversation_commands.remove(ConversationCommand.Notes)
 
     if ConversationCommand.Online in conversation_commands:
-        if not online_search_enabled():
-            conversation_commands.remove(ConversationCommand.Online)
-            # If online search is not enabled, try to read webpages directly
-            if ConversationCommand.Webpage not in conversation_commands:
-                conversation_commands.append(ConversationCommand.Webpage)
-        else:
-            try:
-                online_results = await search_online(
-                    defiltered_query, meta_log, location, custom_filters=_custom_filters
-                )
-            except ValueError as e:
-                logger.warning(f"Error searching online: {e}. Attempting to respond without online results")
+        try:
+            online_results = await search_online(defiltered_query, meta_log, location, custom_filters=_custom_filters)
+        except ValueError as e:
+            logger.warning(f"Error searching online: {e}. Attempting to respond without online results")
 
     if ConversationCommand.Webpage in conversation_commands:
         try: